Continuous Wavelet Transform is a viable signal processing method for extracting diagnostically relevant features from the second heart sound.
CWT shows promise for S2 analysis; leaves open clinical validation and adoption.
This paper is concerned with a synthesis study of Continuous Wavelet Transform (CWT) in analysing the second heart sound of the phonocardiogram (PCG). The second heart sound S2 consists of two major components (A2 and P2) with a time delay between them which is very important for a diagnosis. It is shown that CWT provides enough features of these components of time, frequency and time delay to aid diagnosis.
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Debbal et al. (2004) studied this question.
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